Induction-motor winding.



G. W. STARKER.

INDUCTION MOTOR WINDING.

APPLICATION FILED JUNE 6, 1911.

Patented Jan. 30, 1912.

' INVENTOR WITNESSES:

, A'TTORNEY UNITED STATES PATENT OFFICE.

CHARLES WILLIAM STARKER, PITTSBURGH, PENNSYLVANIA, ASSIGNOR. TO WEST- INGHOUSE ELECTRIC AND MANUFACTURING COMPANY, A CORPORATION OF PENN- SYLVAN IA.

INDUCTION -MOTQR WINDING.

Specification of Letters Patent.

Patented Jan. 30,1912.

Application filed June 6, 1911. SeriaI NO. 631,616.

To all whom it may concern:

Be it known that I, CHARLES W. STARKER,

a subject of the Emperor of Germany, and a resident of Pittsburgh, in the county "of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Induction- Moto'r WVindings, of which the following is a specification.

My invention relates to the windings of dynamo-electric machines and particularly to secondary windings for induction motors.

The object of my invention is to provide a secondary winding, of the squirrel cage type, that'shall be particularly simple in construction and easy to wind and that shall comprise a plurality of short-circuited coils, together with means for holding the end portions of the coils in position under highspced operating conditions.

According to my preseht invention, I provide a plurality of slotted strips of conducting material which are spread into short circuited coils of diamond shape and are wound in suitable slots in the core member of a dynamo-electric machine. After the coils are in position, the end-projecting portions are separated into groups, and end rings, having spaced holes through which the groups of the coil ends extend, are forced or shrunk upon the ends of the winding to hold the coils in position and to assist in producing the characteristics of a squirrel cage winding by interconnecting the coils at their ends.

Figure 1 of the accompanying drawings, 1

is a plan view showing a portion of the core member of an induction motor secondary, wound in accordance with my invention. Fig. 2 isan end view of the motor secondary shown in F ig.'1 and Fig. 3 is a sectional ele-' vation on the line III-III of Fig. 1.

Referring to the drawings, a substantially cylindrical laminated core member 1, having shape in cross section and are provided with flanges 6, having a plurality of spaced holes 7. After the coils are assembled in position,

their ends are forced into groups which extend through the holes 7 in the rings.

The binding rings 5 may be of my suitable form and various modifications may be effected, within the spirit and scope of my invention.

I claim as myinvention:

1. A winding for dynamo-electric machines comprising a plurality of diamond shaped coils having their end portions grouped, and end rings having spaced holes through which the coil end groups project.

2. A winding for dynamo-electric machines comprising a plurality of single-turn,

short-circuited, diamond shaped coils, having their end portions grouped, and end rings having spaced holes through which the coil end groups project. i

3. A winding .for dynamo-electric Inachines comprising a plurality of single turn, short circuited, diamond shaped coils, having their end portions grouped, and end rings which are of L-shape in transverse section and are provided with a plurality of spaced holes, through which theends of the coils project. I 1

-In testimony whereof, I have hereunto subscribed my name this 23rd day of May,

CHARLES WILLIAM STARKER. lVitnesses:

R. P. SCIIOYER, B. B. HINES. 

